/Engine/Plugins/EnhancedInput/Source/EnhancedInput/Public/EnhancedInputLibrary.h
Call SubsystemPredicate on each registered player and standalone enhanced input subsystem.
static void ForEachSubsystem ( [TFunctionRef](API\Runtime\Core\GenericPlatform\TFunctionRef)< void([IEnhancedInputSubsystemInterface](API\Plugins\EnhancedInput\IEnhancedInputSubsystemInterface) *)> SubsystemPredicate )